EP0945363A1 - Cartouche à deux compartiments pour la production de mousse polyuréthane à deux composants - Google Patents

Cartouche à deux compartiments pour la production de mousse polyuréthane à deux composants Download PDF

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Publication number
EP0945363A1
EP0945363A1 EP98121765A EP98121765A EP0945363A1 EP 0945363 A1 EP0945363 A1 EP 0945363A1 EP 98121765 A EP98121765 A EP 98121765A EP 98121765 A EP98121765 A EP 98121765A EP 0945363 A1 EP0945363 A1 EP 0945363A1
Authority
EP
European Patent Office
Prior art keywords
double
fillers
chamber
component
polyurethane foam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98121765A
Other languages
German (de)
English (en)
Inventor
Heinz-Peter Wunram
Friedhelm Schneider
Volker Dresbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
B & F FORMULIER- UND ABFUELL GMBH & CO.KG
Original Assignee
B & F Formulier- und Abfuell GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by B & F Formulier- und Abfuell GmbH filed Critical B & F Formulier- und Abfuell GmbH
Publication of EP0945363A1 publication Critical patent/EP0945363A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

Definitions

  • the invention relates to a double-chamber cartridge for Generation of a 2-component polyurethane foam, the one cartridge chamber one polyol component and the other Cartridge chamber a matched to the polyol component Contains isocyanate component.
  • Such double chamber cartridges are by hand or Compressed air guns through an attached static mixer squeezed through.
  • the polyol component and the isocyanate component only meet in the static mixer and are mixed together in the static mixer. Some time after the mixed product has left the Static mixer starts the reaction of both components and the resulting foaming behavior.
  • the polyol component generally consists of different ones Polyols with a different number of OH groups. Further flame retardants, catalysts, Cell regulator, water and thickener added. These different Components are mixed. In the course of mixing air is inevitable. The air load, their height based on the specific weight of the mixed product can be determined is imperative since the air for nucleation and uniform Foam structure to reduce the bulk density of the finished Polyurethane foam is needed.
  • the isocyanate component can be made from MDI isocyanates or modified prepolymers with a different number of NCO groups.
  • the isocyanate component must be absolutely free of air be kept, as otherwise contained in the air Moisture the NCO groups was degrading. That would have been one Resulting in crystal formation.
  • the number of NCO groups in the Isocyanate component must exactly match the number of OH groups the polyol component by an appropriate modification the recipe.
  • Such double-chamber cartridges are used in particular for spot fixing or gluing, for example Door frames with the masonry of a wall opening or other surfaces.
  • the double chamber cartridge is not continuous, but with interruptions from, for example, 10 to Emptied for 20 seconds to close the desired attachment points produce.
  • the polyol and isocyanate components come into play frequently when the cartridge processing is interrupted already in the static mixer for reactions. These reactions cause plug formation in the static mixer, which results in an increased back pressure during further processing arises, which is overcome by a stronger squeezing force must become. Because of this back pressure it comes inevitably to a compression of the air-laden Polyol component in their cartridge chamber and consequently too delayed material entry into the static mixer.
  • the isocyanate component cannot be compressed and flows when your cartridge chamber is pressurized immediately into the static mixer. This results in incorrect ones Mixing ratios with respect to the polyol and Isocyanate component. Incorrect mixing ratios to a shrinkage of the polyurethane foam produced. This shrinkage in turn causes, for example, gluing from door frames to frame deformations that eventually the door no longer closes.
  • the invention is based on the technical problem Double-chamber cartridge of the embodiment described at the beginning to create which is always a right one Mixing ratio of polyol and isocyanate components avoids and malfunction of the polyurethane foam produced excludes.
  • the invention solves this problem with a generic one Double chamber cartridge in that the isocyanate component anhydrous and compressible by a predetermined amount Fillers are mixed.
  • the invention is based on the Realizing that incorrect mixing ratios of Polyol and isocyanate components are not made from these components itself result if the number of NCO groups is exactly matched to the number of OH groups, but due to dosing fluctuations of the two components are. The result of these metering fluctuations is that in Share the squeezed polyurethane foam of NCO groups and OH groups no longer match and the described misconduct of the Guide polyurethane foam.
  • the invention provides that the isocyanate component Fillers with one corresponding to the polyol component Compressibility are mixed and this Admixture is homogeneous.
  • Compressible fillers can be used Plastic flakes or similar plastic particles be mixed in. It can also be the case with the fillers are compressible hollow plastic spheres. Even the The addition of dry gases as fillers is part of the Invention conceivable. Of particular importance remains for all embodiments the fact that it is anhydrous fillers must act. Because - as already mentioned explained - moisture would increase the number of NCO groups break down and inevitably lead to crystal formation to lead. If plastic-based fillers are used styrene polymers or copolymers or polystyrene. The fillers are based on plastic expediently a specific weight of 0.01 g / ml up to 0.3 g / ml depending on the respectively required Compression of the isocyanate component.
  • the only figure shows an explosive representation partially cut double chamber cartridge with one schematically shown double pistons of a hand gun to squeeze out the two cartridge chambers and a downstream one Static mixer.
  • the double-chamber cartridge 1 shown in the figure is used to create a 2-component polyurethane foam.
  • the two cartridge chambers 2, 3 are next to each other as as it were arranged in twin chambers and are used for squeezing into a hand or compressed air pistol with an indicated one Double piston 4 inserted.
  • Exit is on the two cartridge chambers 2, 3 a common static mixer 5 connected.
  • the isocyanate components are anhydrous and fillers that can be compressed by a predetermined amount 6 added. To a given extent means that both the polyol component as well as the isocyanate component are compressible to the same degree.
  • Fillers 6 with one corresponding to the polyol component Compressibility mixed homogeneously are compressible plastic hollow spheres 6 made of styrene polymers. With such hollow plastic spheres 6 interferes not if they are filled with air because the air in the The compression cannot escape and consequently the moisture in the air is not the number of Can reduce NCO groups of the isocyanate component. in the As a result, there are no dosing fluctuations in the course of foam generation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
EP98121765A 1998-03-21 1998-11-14 Cartouche à deux compartiments pour la production de mousse polyuréthane à deux composants Withdrawn EP0945363A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998112442 DE19812442C1 (de) 1998-03-21 1998-03-21 Doppelkammer-Kartusche zum Erzeugen eines 2-Komponenten Polyurethanschaums
DE19812442 1998-03-21

Publications (1)

Publication Number Publication Date
EP0945363A1 true EP0945363A1 (fr) 1999-09-29

Family

ID=7861795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121765A Withdrawn EP0945363A1 (fr) 1998-03-21 1998-11-14 Cartouche à deux compartiments pour la production de mousse polyuréthane à deux composants

Country Status (3)

Country Link
EP (1) EP0945363A1 (fr)
DE (1) DE19812442C1 (fr)
ES (1) ES2141066T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2323627A1 (es) * 2007-12-05 2009-07-21 Todo Para Sus Pies S.L. Procedimiento de obtencion de un producto para la fabricacion de plan tillas, ortesis y protesis para pies y calzados.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19956448A1 (de) * 1999-11-24 2001-05-31 Fischer Artur Werke Gmbh Zweikomponenten-Polyurethan-Montageschaum
DE10237366A1 (de) * 2002-08-13 2004-02-26 Carcoustics Tech Center Gmbh Schallisolierendes Material und Verfahren zu dessen Herstellung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114382A (en) * 1974-07-26 1978-09-19 Bayer Aktiengesellschaft Process for the consolidation of geological formations and loosened rock and earth masses
EP0085826A1 (fr) * 1982-01-07 1983-08-17 Bergwerksverband GmbH Procédé pour la fixation des boulons d'ancrage dans des trous de forage
EP0341210A1 (fr) * 1988-05-06 1989-11-08 Ciba-Geigy Ag Pièce de forme de mousse de polyuréthane syntactique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4708097A (en) * 1996-10-15 1998-05-11 Henkel Kommanditgesellschaft Auf Aktien Binding agent composition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114382A (en) * 1974-07-26 1978-09-19 Bayer Aktiengesellschaft Process for the consolidation of geological formations and loosened rock and earth masses
EP0085826A1 (fr) * 1982-01-07 1983-08-17 Bergwerksverband GmbH Procédé pour la fixation des boulons d'ancrage dans des trous de forage
EP0341210A1 (fr) * 1988-05-06 1989-11-08 Ciba-Geigy Ag Pièce de forme de mousse de polyuréthane syntactique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2323627A1 (es) * 2007-12-05 2009-07-21 Todo Para Sus Pies S.L. Procedimiento de obtencion de un producto para la fabricacion de plan tillas, ortesis y protesis para pies y calzados.

Also Published As

Publication number Publication date
ES2141066T1 (es) 2000-03-16
DE19812442C1 (de) 1999-10-28

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